All thru the saga. Yoda never seemed to be surprised by events that took place. Hurt and upset, but never surprised. Even during the security holocron footage in the Jedi Temple, Yoda warned Obi-Wan of what he would see and even spoke as though he had already known Darth Sidious was the true identity of Palpatine. So I'm curious if Yoda had already foreseen what was going to happen thru the saga.